<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
</head>
<body>

</body>
<script>
	// - 函数声明
	function fn(){
	
	}
	// - 表达式
	const fn2 = function(){
	
	}
	// - 实例化函数对象（了解）
	const fn3 = new Function("a","b","return a+b");
	console.log(fn3(1,2))
</script>
</html>